1. Unexplained weight loss
Cropped image of woman feet standing on weigh scales, on gray background. A tape measure in the foreground
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Losing weight without trying could be a sign of cancer. It could be caused by a loss of appetite due to nausea or pain, but scientists also believe it could be due to certain chemicals that cancer may release into your blood. This is especially true for cancers like leukemia and lymphoma, which affect the blood system.

2. Fatigue
Unhappy woman touching hair, sitting on floor at home. fatigue
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Feeling tired all the time, even after getting enough sleep, could be a sign of cancer. Fatigue is one of the most common symptoms of cancer and can affect people at any age. It’s usually caused by something else, like anemia or depression.

3. Persistent cough
Shot of illness young woman coughing in the street.
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A cough that lasts for more than two weeks could be a sign of lung cancer. A persistent cough can also be an indication of pneumonia, bronchitis and other lung diseases. If you start coughing up blood, speak to your medical provider immediately.

4. Shortness of breath
Older woman at home doing fitness has severe shortness of breath and chest pain, compares bullets on fitness bracelets
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Difficulty breathing could be a sign of lung cancer or other types of cancer. This is called dyspnea. See your doctor if you notice that you’re taking deep breaths and still feeling short of breath, or if your breathing seems to be labored.

5. Chest pain
Chest pain
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Pain in the chest could be a sign of lung cancer or other types of cancer. See your doctor or go to the emergency room if you have chest pain. Chest pain could also be a sign of a heart attack requiring immediate medical attention.

6. Abdominal pain
Man suffering from nausea on bed at home
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Pain in the abdomen could be a sign of ovarian, pancreatic, liver, or other types of cancer. See your healthcare provider if you have abdominal pain. Abdominal pain could also be a sign of intestinal blockage or gallstones requiring immediate medical attention.

7. Changes in bowel habits
Man Sitting on Toilet in Bathroom
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Changes in bowel habits, such as diarrhea or constipation, could be a sign of colon cancer. See your health care provider if you have changes in bowel habits. (7)Buy vitamins and supplements

8. Blood in urine or stool
blood in urine analysis as an idea of urogenital system disease and prostate cancer. disease based on the result of a urine test
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Blood in the urine or stool could be a sign of bladder, kidney, or colon cancer. See your healthcare provider if you have blood in your urine or stool. Also, if you notice changes in urination patterns, this could also be a sign of cancer. If you suddenly need to urinate more often than usual or have difficulty starting or stopping urination, this could be a sign of bladder cancer. See your healthcare provider if you have these symptoms.

9. Difficulty swallowing
Close up of sick man suffering from throat problems, grey background, isolated. Thyroid gland, painful swallowing, pharyngitis, laryngeal swelling concept. Inflammation of the upper respiratory tract
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Difficulty swallowing could be a sign of throat cancer or esophageal cancer. See your healthcare provider if you have difficulty swallowing. Difficulty swallowing could also be a symptom of a less serious condition, such as acid reflux or GERD.

10. Hoarseness
lady touching neck with hand, inflamed red zone
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Hoarseness could be a sign of throat cancer or laryngeal cancer. See your healthcare provider if you have hoarseness. Hoarseness could also be a symptom of a less serious condition, such as sinusitis or bronchitis.

11. Skin changes
Close up woman looks in mirror touch face feels upset detects mimic wrinkles or pigment spots
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Changes in the skin, such as darkening or yellowing, could be a sign of skin cancer. See your healthcare provider if you have a change in the color or appearance of patches of skin. Skin changes also could be a symptom of a less serious condition, such as psoriasis or eczema.

12. Sores that don’t heal
Pain or wound on foot.
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Sores that don’t heal could be a sign of skin cancer or other types of cancer. See your healthcare provider if you have sores that don’t heal or that bleeds. Sores also could be a symptom of a less serious condition, such as shingles (herpes zoster) or chickenpox.

13. Swollen lymph nodes
Closeup view of a young woman with Sore throat or pain on neck or thyroid gland. isolated on white background. People body problem concept
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Swollen lymph node could be a sign of lymphoma or other types of cancer. See your healthcare provider if you have swollen lymph nodes. Swollen lymph nodes also could be a symptom of an infection or other less serious condition, such as mononucleosis.

14. Headaches
man suffering from strong headache or migraine sitting with glass of water
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Headaches could be a sign of brain cancer. See your healthcare provider if you have headaches that don’t go away or worsen. Headaches also could be a symptom of another less serious condition, such as stress, sinus infections, or tension headaches.

15. Vision changes
Tired of computer african businessman taking off glasses feels eye strain fatigue after long office work on laptop, exhausted overworked stressed depressed black man having bad sight vision problem
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Vision changes could be a sign of eye cancer. See your healthcare provider if you have vision changes that don’t go away or get worse. Vision changes also could be a symptom of another less serious condition, such as a detached retina or cataracts.

16. Bone pain
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Bone pain could be a sign of bone cancer or other types of cancer that have spread to the bones. See your healthcare provider if you have bone pain that doesn’t go away or get worse. Bone pain also could be a symptom of another less serious condition, such as arthritis or osteoporosis.

17. Joint pain
suffering from pain in knee. Tendon problems and Joint inflammation
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Joint pain could be a sign of bone cancer or other types of cancer that have spread to the bones. See your healthcare provider if you have joint pain that doesn’t go away or get worse. Joint pain also could be a symptom of another less serious condition, such as arthritis or osteoporosis.

18. Nausea and vomiting
Man suffering from sick stomach and vomiting
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Nausea and vomiting could be a sign of cancer, especially if it is accompanied by other symptoms. Call your healthcare provider if you have nausea or vomiting that lasts for more than one day. If you have these symptoms with other signs and symptoms of bone cancer, such as weight loss, back or chest pain, and bowel movement changes, see your healthcare provider immediately.

19. Fever
woman struggle with high temperature measure with thermometer
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A fever that lasts for more than a few days could be a sign of cancer. If you have a fever that lasts for more than a few days, call your healthcare provider. If you have other signs and symptoms of cancer, such as weight loss, back or chest pain, and bowel movement changes, see your healthcare provider immediately.

20. Night sweats
Exhausted woman suffering suring the heatwave, she is holding a water bottle and sitting in front of a cooling fan in the bedroom
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Night sweats could be a sign of lymphoma or other types of cancer. If you have night sweats that last for more than a few days, call your healthcare provider.

If you experience any of these symptoms, seeing a doctor as soon as possible is important. Early detection is critical in the fight against cancer, and the sooner you seek treatment, the better your chances of survival.